With
a location in Point1, a distance in Distance and the starting angle in Angle1 Calculate->Point 2
will return
the end location. This is derived using the Vincenty Direct formula.
The
Vincenty formulas are VERY accurate. With the Python code running it
through a series of locations using the
Inverse formula and the returned values input to the Direct formula the result
coincided usually to 10 decimal places
but did not exceed +/- 1 in the 9th decimal place. 9 decimal places is one
billionth of a meter. The accuracy will not be
affected by the calculations. The accuracy of data input for locations, distance and
starting angle, for all intent and
purposes, will
determine the accuracy of the output.
This uses WGS84 but a modification
of the code could use another reference.
The
format for the Latitude, Longitude and the start and ending angles can be:
degrees
degrees minutes
degrees minutes seconds
The distance can be in meters, kilometers, nautical miles, miles or feet.
Under Settings the decimal places displayed can also be set.
This can be used with the NLNww app to get the points, go to the points, draw the line between the points,
calculate the distance and angles, etc. and it will draw survey data from text files, each segment can be picked to give the endpoints, the distance and angles can be calculated, copied, pasted, etc.
Your survey data, or any similar data, is drawn on top of any active layer you have turned on in NLNww.
Here are a few more images.
email: neil@nlneilson.com